DIXON – An agency that oversees professional licenses statewide may be launching an investigation into auditing firms the city says failed to detect two decades of fraud committed by Rita Crundwell.

The Illinois Department of Financial and Professional Regulation sent a letter to the Lee County Circuit Clerk's office Jan. 25, saying it learned of the city's lawsuit and was requesting all documentation.

Specifically, the letter cites lawsuit defendants Samuel Card, Ron Blaine, and Todd Etheridge, as well as CliftonLarsonAllen LLP and the now-defunct Clifton Gunderson LLP.